Where to get the old jars of openEHR?

Sorry if this is not the right forum to ask this question. I am new to openEHR.

I was trying to test the ehr2ont sandbox. For that I downloaded the following jars of openEHR: http://www.openehr.org/wiki/display/projects/Java+Project+Download

But when I tried to compile the project it gave me some errors. I think that is because I was using the latest versions of openEHR jars, whereas, the ehr2ont maintainers are recommending some old versions of openEHR jars: http://code.google.com/p/ehr2ont/wiki/README

The question is where can I get the old version of openEHR jars?

Regards,
Abbas Eusofzay,
Pakistan.